Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/50r17 vs 275/40r17 Tire Comparison Side By Side
  275/50-17 275/40-17 Difference
Diameter inches (mm) 27.83 (706.8) 25.66 (651.8) -2.17 (-55) -7.8%
Width inches (mm) 10.83 (275) 10.83 (275) 0 (0) 0%
Circum. inches (mm) 87.42 (2220.48) 80.62 (2047.69) -6.8 (-172.79) -7.8%
Sidewall Height inches (mm) 5.41 (137.5) 4.33 (110) -1.08 (-27.5) -20%
Revolutions per mile (km) 724.77 (450.35) 785.93 (488.35) 61.16 (38) 8.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.44 mph (29.68 km/h)
25 mph (40.23 km/h)23.05 mph (37.1 km/h)
30 mph (48.28 km/h)27.67 mph (44.52 km/h)
35 mph (56.33 km/h)32.28 mph (51.94 km/h)
40 mph (64.37 km/h)36.89 mph (59.36 km/h)
45 mph (72.42 km/h)41.5 mph (66.79 km/h)
50 mph (80.47 km/h)46.11 mph (74.21 km/h)
55 mph (88.51 km/h)50.72 mph (81.63 km/h)
60 mph (96.56 km/h)55.33 mph (89.05 km/h)
65 mph (104.61 km/h)59.94 mph (96.47 km/h)
70 mph (112.65 km/h)64.55 mph (103.89 km/h)
75 mph (120.7 km/h)69.16 mph (111.31 km/h)
80 mph (128.75 km/h)73.77 mph (118.73 km/h)
85 mph (136.79 km/h)78.39 mph (126.15 km/h)
90 mph (144.84 km/h)83 mph (133.57 km/h)
95 mph (152.89 km/h)87.61 mph (140.99 km/h)
100 mph (160.93 km/h)92.22 mph (148.41 km/h)

Gear Ratio / RPMs for New Tire (@ 65 mph)
2.35 2.73 2.94 3.07 3.21 3.31 3.42 3.55 3.73 3.91 4.11 4.27 4.56 4.88 5.13 5.29 5.38 5.71 6.17 7.17
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